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gem5/build/SConstruct
Steve Reinhardt 51647e7bec Enable building only selected CPU models via new scons 
CPU_MODELS parameter.  For example:
scons CPU_MODELS="SimpleCPU,FullCPU" ALPHA_SE/m5.debug
Unfortunately the option is not sticky due to a scons
bug with saving & restoring ListOption parameters.

SConscript:
    Separate out cpu-model-specific files so they can be conditionally
    included based on value of new CPU_MODELS parameter.
    Most of these are now handled in cpu/SConscript, except for FullCPU
    which is still in this file.
arch/SConscript:
    The set of CPU-model-specific execute files must now be
    determined from the CPU_MODELS parameter, via the new
    cpu_models.py file.
    Also pass the list of configured CPU models to isa_parser.py.
arch/isa_parser.py:
    Move CpuModel definition and objects out to a
    separate file so they can be shared with scons.
    Global list of CPU models to generate code for is now
    controlled by command-line parameters (so we can do
    only a subset of the available ones).
build/SConstruct:
    Define new CPU_MODELS ListOption.
cpu/static_inst.hh:
    Rename static_inst_impl.hh to static_inst_exec_sigs.hh.

--HG--
extra : convert_revision : 163df32a76d4c05900490b2bce4c7962a5e3f614
2006-02-23 17:00:29 -05:00

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# -*- mode:python -*-
# Copyright (c) 2004-2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
###################################################
#
# SCons top-level build description (SConstruct) file.
#
# To build M5, you need a directory with three things:
# 1. A copy of this file (named SConstruct).
# 2. A link named 'm5' to the top of the M5 simulator source tree.
# 3. A link named 'ext' to the top of the M5 external source tree.
#
# Then type 'scons' to build the default configuration (see below), or
# 'scons <CONFIG>/<binary>' to build some other configuration (e.g.,
# 'ALPHA_FS/m5.opt' for the optimized full-system version).
#
###################################################
# Python library imports
import sys
import os
# Check for recent-enough Python and SCons versions
EnsurePythonVersion(2,3)
EnsureSConsVersion(0,96)
# The absolute path to the current directory (where this file lives).
ROOT = Dir('.').abspath
# Paths to the M5 and external source trees (local symlinks).
SRCDIR = os.path.join(ROOT, 'm5')
EXT_SRCDIR = os.path.join(ROOT, 'ext')
# Check for 'm5' and 'ext' links, die if they don't exist.
if not os.path.isdir(SRCDIR):
print "Error: '%s' must be a link to the M5 source tree." % SRCDIR
Exit(1)
if not os.path.isdir('ext'):
print "Error: '%s' must be a link to the M5 external source tree." \
% EXT_SRCDIR
Exit(1)
# tell python where to find m5 python code
sys.path.append(os.path.join(SRCDIR, 'python'))
###################################################
#
# Figure out which configurations to set up.
#
#
# It's prohibitive to do all the combinations of base configurations
# and options, so we have to infer which ones the user wants.
#
# 1. If there are command-line targets, the configuration(s) are inferred
# from the directories of those targets. If scons was invoked from a
# subdirectory (using 'scons -u'), those targets have to be
# interpreted relative to that subdirectory.
#
# 2. If there are no command-line targets, and scons was invoked from a
# subdirectory (using 'scons -u'), the configuration is inferred from
# the name of the subdirectory.
#
# 3. If there are no command-line targets and scons was invoked from
# the root build directory, a default configuration is used. The
# built-in default is ALPHA_SE, but this can be overridden by setting the
# M5_DEFAULT_CONFIG shell environment veriable.
#
# In cases 2 & 3, the specific file target defaults to 'm5.debug', but
# this can be overridden by setting the M5_DEFAULT_BINARY shell
# environment veriable.
#
###################################################
# Find default configuration & binary.
default_config = os.environ.get('M5_DEFAULT_CONFIG', 'ALPHA_SE')
default_binary = os.environ.get('M5_DEFAULT_BINARY', 'm5.debug')
# Ask SCons which directory it was invoked from. If you invoke SCons
# from a subdirectory you must use the '-u' flag.
launch_dir = GetLaunchDir()
# Build a list 'my_targets' of all the targets relative to ROOT.
if launch_dir == ROOT:
# invoked from root build dir
if len(COMMAND_LINE_TARGETS) != 0:
# easy: use specified targets as is
my_targets = COMMAND_LINE_TARGETS
else:
# default target (ALPHA_SE/m5.debug, unless overridden)
target = os.path.join(default_config, default_binary)
my_targets = [target]
Default(target)
else:
# invoked from subdirectory
if not launch_dir.startswith(ROOT):
print "Error: launch dir (%s) not a subdirectory of ROOT (%s)!" \
(launch_dir, ROOT)
Exit(1)
# make launch_dir relative to ROOT (strip ROOT plus slash off front)
launch_dir = launch_dir[len(ROOT)+1:]
if len(COMMAND_LINE_TARGETS) != 0:
# make specified targets relative to ROOT
my_targets = map(lambda x: os.path.join(launch_dir, x),
COMMAND_LINE_TARGETS)
else:
# build default binary (m5.debug, unless overridden) using the
# config inferred by the invocation directory (the first
# subdirectory after ROOT)
target = os.path.join(launch_dir.split('/')[0], default_binary)
my_targets = [target]
Default(target)
# Normalize target paths (gets rid of '..' in the middle, etc.)
my_targets = map(os.path.normpath, my_targets)
# Generate a list of the unique configs that the collected targets reference.
build_dirs = []
for t in my_targets:
dir = t.split('/')[0]
if dir not in build_dirs:
build_dirs.append(dir)
###################################################
#
# Set up the default build environment. This environment is copied
# and modified according to each selected configuration.
#
###################################################
env = Environment(ENV = os.environ, # inherit user's environment vars
ROOT = ROOT,
SRCDIR = SRCDIR,
EXT_SRCDIR = EXT_SRCDIR)
env.SConsignFile("sconsign")
# I waffle on this setting... it does avoid a few painful but
# unnecessary builds, but it also seems to make trivial builds take
# noticeably longer.
if False:
env.TargetSignatures('content')
# M5_EXT is used by isa_parser.py to find the PLY package.
env.Append(ENV = { 'M5_EXT' : EXT_SRCDIR })
# Set up default C++ compiler flags
env.Append(CCFLAGS='-pipe')
env.Append(CCFLAGS='-fno-strict-aliasing')
env.Append(CCFLAGS=Split('-Wall -Wno-sign-compare -Werror -Wundef'))
if sys.platform == 'cygwin':
# cygwin has some header file issues...
env.Append(CCFLAGS=Split("-Wno-uninitialized"))
env.Append(CPPPATH=[os.path.join(EXT_SRCDIR + '/dnet')])
# Default libraries
env.Append(LIBS=['z'])
# Platform-specific configuration
conf = Configure(env)
# Check for <fenv.h> (C99 FP environment control)
have_fenv = conf.CheckHeader('fenv.h', '<>')
if not have_fenv:
print "Warning: Header file <fenv.h> not found."
print " This host has no IEEE FP rounding mode control."
# Check for mysql.
mysql_config = WhereIs('mysql_config')
have_mysql = mysql_config != None
# Check MySQL version.
if have_mysql:
mysql_version = os.popen(mysql_config + ' --version').read()
mysql_version = mysql_version.split('.')
mysql_major = int(mysql_version[0])
mysql_minor = int(mysql_version[1])
# This version check is probably overly conservative, but it deals
# with the versions we have installed.
if mysql_major < 4 or (mysql_major == 4 and mysql_minor < 1):
print "Warning: MySQL v4.1 or newer required."
have_mysql = False
# Set up mysql_config commands.
if have_mysql:
mysql_config_include = mysql_config + ' --include'
if os.system(mysql_config_include + ' > /dev/null') != 0:
# older mysql_config versions don't support --include, use
# --cflags instead
mysql_config_include = mysql_config + ' --cflags | sed s/\\\'//g'
# This seems to work in all versions
mysql_config_libs = mysql_config + ' --libs'
env = conf.Finish()
# Define the universe of supported ISAs
env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']
# Define the universe of supported CPU models
env['ALL_CPU_LIST'] = ['SimpleCPU', 'FastCPU', 'FullCPU', 'AlphaFullCPU']
# Sticky options get saved in the options file so they persist from
# one invocation to the next (unless overridden, in which case the new
# value becomes sticky).
sticky_opts = Options(args=ARGUMENTS)
sticky_opts.AddOptions(
EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']),
BoolOption('FULL_SYSTEM', 'Full-system support', False),
BoolOption('ALPHA_TLASER',
'Model Alpha TurboLaser platform (vs. Tsunami)', False),
BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
False),
BoolOption('SS_COMPATIBLE_FP',
'Make floating-point results compatible with SimpleScalar',
False),
BoolOption('USE_SSE2',
'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
False),
BoolOption('STATS_BINNING', 'Bin statistics by CPU mode', have_mysql),
BoolOption('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
BoolOption('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
('CC', 'C compiler', os.environ.get('CC', env['CC'])),
('CXX', 'C++ compiler', os.environ.get('CXX', env['CXX'])),
BoolOption('BATCH', 'Use batch pool for build and tests', False),
('BATCH_CMD', 'Batch pool submission command name', 'qdo')
)
# Non-sticky options only apply to the current build.
nonsticky_opts = Options(args=ARGUMENTS)
nonsticky_opts.AddOptions(
# This really should be a sticky option, but there's a bug in
# scons 0.96.1 that causes ListOptions not to be able to be
# restored from a saved option file. It looks like this is fixed
# in 0.96.9, but there's a different bug in that version that means we
# can't just upgrade.
ListOption('CPU_MODELS', 'CPU models', 'all', env['ALL_CPU_LIST']),
BoolOption('update_ref', 'Update test reference outputs', False)
)
# These options get exported to #defines in config/*.hh (see m5/SConscript).
env.ExportOptions = ['FULL_SYSTEM', 'ALPHA_TLASER', 'USE_FENV', \
'USE_MYSQL', 'NO_FAST_ALLOC', 'SS_COMPATIBLE_FP', \
'STATS_BINNING']
# Define a handy 'no-op' action
def no_action(target, source, env):
return 0
env.NoAction = Action(no_action, None)
# libelf build is described in its own SConscript file.
# SConscript-global is the build in build/libelf shared among all
# configs.
env.SConscript('m5/libelf/SConscript-global', exports = 'env')
###################################################
#
# Define a SCons builder for configuration flag headers.
#
###################################################
# This function generates a config header file that #defines the
# option symbol to the current option setting (0 or 1). The source
# operands are the name of the option and a Value node containing the
# value of the option.
def build_config_file(target, source, env):
(option, value) = [s.get_contents() for s in source]
f = file(str(target[0]), 'w')
print >> f, '#define', option, value
f.close()
return None
# Generate the message to be printed when building the config file.
def build_config_file_string(target, source, env):
(option, value) = [s.get_contents() for s in source]
return "Defining %s as %s in %s." % (option, value, target[0])
# Combine the two functions into a scons Action object.
config_action = Action(build_config_file, build_config_file_string)
# The emitter munges the source & target node lists to reflect what
# we're really doing.
def config_emitter(target, source, env):
# extract option name from Builder arg
option = str(target[0])
# True target is config header file
target = os.path.join('config', option.lower() + '.hh')
# Force value to 0/1 even if it's a Python bool
val = int(eval(str(env[option])))
# Sources are option name & value (packaged in SCons Value nodes)
return ([target], [Value(option), Value(val)])
config_builder = Builder(emitter = config_emitter, action = config_action)
env.Append(BUILDERS = { 'ConfigFile' : config_builder })
###################################################
#
# Define build environments for selected configurations.
#
###################################################
# rename base env
base_env = env
for build_dir in build_dirs:
# Make a copy of the default environment to use for this config.
env = base_env.Copy()
# Record what build_dir was in the environment
env.Append(BUILD_DIR=build_dir);
# Set env according to the build directory config.
sticky_opts.files = []
# Name of default options file is taken from 'default=' on command
# line if set, otherwise name of build dir.
default_options_file = os.path.join('build_options', 'default',
ARGUMENTS.get('default', build_dir))
if os.path.isfile(default_options_file):
sticky_opts.files.append(default_options_file)
current_options_file = os.path.join('build_options', 'current', build_dir)
if os.path.isfile(current_options_file):
sticky_opts.files.append(current_options_file)
else:
# if file doesn't exist, make sure at least the directory is there
# so we can create it later
opt_dir = os.path.dirname(current_options_file)
if not os.path.isdir(opt_dir):
os.mkdir(opt_dir)
if not sticky_opts.files:
print "%s: No options file found in build_options, using defaults." \
% build_dir
# Apply current option settings to env
sticky_opts.Update(env)
nonsticky_opts.Update(env)
# Process option settings.
if not have_fenv and env['USE_FENV']:
print "Warning: <fenv.h> not available; " \
"forcing USE_FENV to False in", build_dir + "."
env['USE_FENV'] = False
if not env['USE_FENV']:
print "Warning: No IEEE FP rounding mode control in", build_dir + "."
print " FP results may deviate slightly from other platforms."
if env['EFENCE']:
env.Append(LIBS=['efence'])
if env['USE_MYSQL']:
if not have_mysql:
print "Warning: MySQL not available; " \
"forcing USE_MYSQL to False in", build_dir + "."
env['USE_MYSQL'] = False
else:
print "Compiling in", build_dir, "with MySQL support."
env.ParseConfig(mysql_config_libs)
env.ParseConfig(mysql_config_include)
# Save sticky option settings back to current options file
sticky_opts.Save(current_options_file, env)
# Do this after we save setting back, or else we'll tack on an
# extra 'qdo' every time we run scons.
if env['BATCH']:
env['CC'] = env['BATCH_CMD'] + ' ' + env['CC']
env['CXX'] = env['BATCH_CMD'] + ' ' + env['CXX']
if env['USE_SSE2']:
env.Append(CCFLAGS='-msse2')
# The m5/SConscript file sets up the build rules in 'env' according
# to the configured options. It returns a list of environments,
# one for each variant build (debug, opt, etc.)
envList = SConscript('m5/SConscript', build_dir = build_dir,
exports = 'env', duplicate = False)
# Set up the regression tests for each build.
for e in envList:
SConscript('m5-test/SConscript',
build_dir = os.path.join(build_dir, 'test', e.Label),
exports = { 'env' : e }, duplicate = False)
###################################################
#
# Let SCons do its thing. At this point SCons will use the defined
# build environments to build the requested targets.
#
###################################################
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